When and where 做主语时谓语动词是单数还是复数

1. 单复数一致：
主语是可数名词的单数，或者是不可数名词，谓语就是单数。比如：
Fire was first used by Peking man.
北京人首先使用了火。
The milk in the fridge is fresh.
冰箱里的牛奶是新鲜的。

2. 集合名词作主语要看是表示整天概念，还是强调集体里的成员：
My family is in New York.
我们家住在纽约。（家庭）
My family are watching TV.
我们家在看电视。（家人）
3. 一些单数复数一致的名词，要根据语义判断单个还是多个：
A lot of sheep are eating grass.
很多绵羊在吃草。
A sheep is under the tree.
一只绵羊在树下。
除了sheep之外，还有 fish, Chinese, people等。

4. news 末尾有 s ,但是却是个不可数名词，谓语用单数：
That is good news for Jimmy.
那对吉米来说是个好消息。
Maths is hard to learn.
数学不好学。
5. 眼镜、鞋子、袜子、手套、裤子、剪刀、钳子都是复数，谓语动词用复数：
The pants are nice and I'll take them.
这裤子很不错，我买了。
Scissors are dangerous for children.
剪刀对孩子们来说是危险的。

6. 因为 lots of 和 a lot of 即可修饰可数、也可修饰不可数名词，所以还是要根据语义判断单复数：
A lot of time has been wasted.
大量时间被浪费。
Lots of people are still watching.
很多人还在观望。
7. 注意 and 连接的名词，如果指一个整体，用单数，指两个名词并列，用复数。
The boy and his dog are running.
男孩和他的狗狗在那跑。
Fish and potatoes is popular in England.
鱼和土豆在英格兰深受欢迎。（一种食物）

8. 在 there be 结构中，使用就近原则，就是靠近there be 的那个名次，决定be 的形式：
There i

is
如果when和where连在一起用单数,如果分开用复数,例如：
When and where they had the party was unknown.
When they had the party and where they had it were unknown.

when and where不可能是主语，因为它们是副词。放在句首的并不一定就是主语。
用when and where开头的句子，真正的主语是when and where之后的助动词(或情态动词或be动词)再后的成份。
所以，谓语动词用单数还是复数，取决于助动词(或情态动词或be动词)再后的成份，即主语。如When and where does he join the Young Pioneers?
他是何时何地加入少先队的？
此句，主语是he，不是when and where。when and where是副词，分别作时间和地点状语。由于he是单数，
所以用且动词does.再如，When and where were they playing games?他们是何时何地玩游戏来着？they是主语，所以用were.